A statement said their release was due to "the efficient collaboration of local Libyan authorities" but did not provide details.
They were kidnapped on Sept. 19 in Ghat by a group of armed men who blocked their vehicle.
It identified the Italians as Danilo Calonego and Bruno Cacace and the Canadian citizen of Italian origin, Frank Poccia.
ANSA news agency said they are all technicians with an Italian company, Conicos, which is doing construction work at an airport in Libya.
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